cerc-io/plugeth
18
0
Fork 1
Code Issues 4 Pull Requests Packages Projects Releases Wiki Activity

Correct stack size validation for MUL, CALLDATACOPY, EXTCODESIZE, BLOCKHASH

Browse Source
This commit is contained in:
Gustav Simonsson 2015-02-21 05:33:51 +01:00
parent bba7ccb07f
commit fd3793b8cf
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
vm/vm.go
View File

@ -779,9 +779,9 @@ func (self *Vm) calculateGasAndSize(context *Context, caller ContextRef, op OpCo
// Stack Check, memory resize & gas phase
switch op {
// Stack checks only
case ISZERO, CALLDATALOAD, POP, JUMP, NOT: // 1
case ISZERO, CALLDATALOAD, POP, JUMP, NOT, EXTCODESIZE, BLOCKHASH: // 1
stack.require(1)
case JUMPI, ADD, SUB, DIV, SDIV, MOD, SMOD, LT, GT, SLT, SGT, EQ, AND, OR, XOR, BYTE, SIGNEXTEND: // 2
case JUMPI, ADD, SUB, DIV, MUL, SDIV, MOD, SMOD, LT, GT, SLT, SGT, EQ, AND, OR, XOR, BYTE, SIGNEXTEND: // 2
stack.require(2)
case ADDMOD, MULMOD: // 3
stack.require(3)
@ -859,7 +859,7 @@ func (self *Vm) calculateGasAndSize(context *Context, caller ContextRef, op OpCo
newMemSize = calcMemSize(stack.Peek(), stack.data[stack.Len()-2])
additionalGas.Set(stack.data[stack.Len()-2])
case CALLDATACOPY:
stack.require(2)
stack.require(3)
newMemSize = calcMemSize(stack.Peek(), stack.data[stack.Len()-3])
additionalGas.Set(stack.data[stack.Len()-3])